Friction clutch mechanism.



No. 794,393. PATENTBD JULY 11, 1905.

M. CAMPBELL. 4 FRICTION CLUTCH MECHANISM.

Patented July 11, 1905.

FFTCEQ MALCOLM CAMPBELL, OF BOSTON, MASSACHUSETTS.

FRICTION CLUTCH MECHANISM.

SPECIFICATION forming part of Letters Patent No. 794,393, dated July 11,1905.

Application filed June 14, 1900. Serial No. 20,298.

T 0 all whmn it may concern:

Be it known that 1, MALooLM CAMPBELL, a citizen of the United States,and a resident of Boston, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful Improvements inFriction Clutch Mechanism, of which the following is aspecification.

Thisinvention has relation to friction clutch mechanisms of the classwherein confronting members are drawn into frictional engagement.

The object of the invention is to provide a clutch mechanism of the typespecified wherein provision is made for effecting a completedisengagement of the controlling friction members when it is desired touncouple the driving and driven parts.

To this end the invention consists of a clutch mechanism having certainfeatures of construction and relative arrangement of parts, asillustrated upon the accompanying drawings, described in the followingspecification, and set forth in the appended claims.

Referring to the said drawings, Figure 1 represents in front elevation aclutch mechanism embodying the invention. Fig. 2. represents alongitudinal section through the same on the line 2 2 of Fig. 1. Fig. 3represents an enlarged section on the same line. Fig. 4 represents asection on the line 4 4 of Fig. 3.

As illustrated on the said drawings, the present invention is employedfor coupling two shafts, whichldenominate the driving and the drivenshafts; butit will be understood that the invention may be employed forcoupling a shaft to a pulley or two pulleys together.

(0 indicates the driving-sl1aft,and .7) the driven shaft. To thedriving-shaft is rigidly keyed a friction member 0, consisting of a diskhaving a hub c. 01 represents a friction member confronting that at cand movable relatively thereto. tate therewith, but is movable axiallyrelatively thereto. The member (Z is likewise disk-shaped, and it hasafrusto-conical annular boss 01, adapted to enter a tapering socket 0 inthe member 0 for alining the two shafts when coupled together. Themembers 0 and (Z have flat faces which may be frictionally It isconnected to the shaft 6 to ro-.

engaged, and in addition the member (Z is equipped with an auxiliarymember a in the shape of a ring adapted to make contact with the otherface of the member 0. The members (Z and e are connected to rotatetogether by means which will be subsequently described, and they areheld yieldingly apart by springs f placed between them.

Rigidly secured to the end of the shaft 6 is a carrier g, which isdisk-shaped and has a flanged rim g, over which laps a flanged rim 0 onthe ring or member Studs g are inserted radially in the rim g and arepassed through slots 0 formed in the rim 6, whereby the ring a isadapted to move axially relatively to the carrier Studs it are passedloosely through apertures in the carrier g and have reduced portionsforced into ape-rtures in the member d and rigidly connected to thelatter, said studs having shoulders h, which bear against the outer faceof the said member cl. Said studs are provided at their ends with pinsaround which the springs f are encircled.

Bolts 11 i are passed through the carrier the member d, and thesupplemental member 6 to connect them all loosely together, said bolts,however, preventing any rotative movement of one of said partsrelatively to another. The said bolts are arranged in pairs and theirheads are apertured to provide journal-bearings to receive pintles 7',on which are journaled the hubs l: of elbow-levers having the short armsk and the long arms 71: The short arms it" bear against the ends of thestuds it, as shown in Fig. 3, so that by rocking the said levers aboutthe pintles 7' the said studs may be forced inward against the pressureof the springs f to contract the members d and 6 into tight frictionalengagement with the member 0. The studs it are arranged at equaldistances from each other and two or more may be employed, the mechanismwhich I have illustrated having four of them. The outer ends of thearms/r: are connected by links m with ears a on a sleeve a, loosely slidingon the shaft 6. When the sleeve is slid into the position shown in Fig.2, the elbow-levers are rocked to move the movable parts of the clutchinto engagement with the non-sliding member. As soon as the sleeve n ismoved to an inoperative position the springs f separate the members 0?and 0, so as to move them entirely out of contact with the member 0. Thecarrier 9 sustains both the member cl and the member 6, although itpermits the latter to be moved toward and from each other.

Having thus explained the nature of the invention and described a way ofconstructing and using the same, although without attempting to setforth all of the forms in which it may be made or all of the modes ofits use, I declare that what 1 claim is 1. Friction clutch mechanismcomprising a carrier having a cylindrical flange, pins projccting fromthe periphery of said flange, a friction-ring having a cylindricalflange overlapping said iirst-mentioned flange, slots in the flange ofsaid ring cooperating with said pins in producing an axial slidingconnection between said carrier and said friction-ring, studs extendingthrough said carrier. and supported thereby, a. friction-disk supportedbetween said carrier and said friction-ring by said studs, said studsbeing fixed with relation to said friction-disk, springs interposedbetween said friction-ring and said frictiondisk, a friction memberbetween said frictionring and said friction-disk, and operating-leversmounted on fulcra connected to said friction-ring, said levers havingcams bearing against the projecting ends of said studs.

2. Friction clutch mechanism comprising a friction member, a carrier, afriction-ring overhanging said friction member means for slidablyconnecting said ring to the carrier, studs passing through said carrier,a frictiondisk supported by said studs, bolts passed through all of saidmembers and holding them loosely in relative position said bolts beingconnected to said ring, pintles mounted in the heads of said bolts,operating-levers supported by said pintles and having cams bearingagainst said studs, the latter. being provided with shoulders bearingagainst said friction-disk, and means for holding all of said membersnormally out of engagement.

In testimony whereof I have afiixed my signaturein presence of twowitnesses.

MALCOLM CAMPBELL.

Witnesses:

MARCUS B. MAY, C. C. STECHER.

